The son of a Hamas leader, who also happens to be one of their most outspoken critics, took to the airwaves to denounce the organization and their belief system.

Mosab Hassan Yousef is a Hamas defector, former informant for Israel’s internal security service Shin Bet and son of one of Hamas’ founding members. In the midst of the crisis between Israel and Palestine, Yousef spoke to CNN’s Don Lemon about the organization’s ideology.

“Hamas does not care about the lives of Palestinians, or the lives of Israelis, or Americans; they don’t care about their own lives,” Yousef said. “They consider dying for their ideology a way of worship. Hamas is not seeking coexistence and compromise; Hamas is seeking conquest.”

While many believe that Hamas’ goal is to destroy Israel, Yousef says that’s not exactly true. Their “final destination,” he says, is to build an Islamic state “on the rubble of every other civilization.”

“In the mosques, Hamas told us that without shedding innocent blood for the sake of the ideology, we will not be able to build an Islamic state,” Yousef told Lemon. “They were preparing us from the age as young as five years old. This is the ideology that Hamas was feeding us.”

Yousef became known after he converted to Christianity and was disowned by his father. After being an undercover informant for Shin Bet between 1997 and 2007, Yousef moved to the United States, where he converted religions, and authored a 2010 autobiography. Just this year, a film called “The Green Prince” was released, telling the story of Yousef’s life. Yousef’s family has repeatedly said that his account of his upbringing and allegations against Hamas are false.